Sunday, August20, 2017 L-36.com


Marine Weather and Tides
Bay City, OR

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:19AMSunset 8:11PM Sunday August 20, 2017 1:51 PM PDT (20:51 UTC) Moonrise 4:03AMMoonset 6:45PM Illumination 2% Phase: Waning Crescent; Moon at 28 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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PZZ250 Coastal Waters From Cape Shoalwater Wa To Cascade Head Or Out 10 Nm- Waters From Cape Shoalwater Wa To Cascade Head Or From 10 To 60 Nm- 844 Am Pdt Sun Aug 20 2017
Today..N wind 10 to 15 kt with gusts to 20 kt. Wind waves N 5 ft at 5 seconds. W swell 4 ft at 10 seconds.
Tonight..N wind 10 to 15 kt with gusts to 20 kt. Wind waves N 4 ft at 5 seconds. W swell 3 ft at 10 seconds. Patchy fog after midnight.
Mon..N wind 10 to 15 kt with gusts to 20 kt. Wind waves N 4 ft at 5 seconds. NW swell 3 ft at 9 seconds.
Mon night..N wind 15 to 20 kt, easing to 10 to 15 kt after midnight. Wind waves N 4 ft at 5 seconds. W swell 3 ft at 9 seconds.
Tue..N wind 10 to 15 kt, easing to 5 to 10 kt in the afternoon. Wind waves N 3 ft at 4 seconds. W swell 4 ft at 11 seconds.
Tue night..NW wind 10 to 15 kt, easing to 5 to 10 kt after midnight. Wind waves nw 3 ft at 4 seconds. W swell 4 ft at 11 seconds.
Wed..W wind 5 to 10 kt. Wind waves 3 ft. W swell 4 ft.
Thu..NW wind 5 to 10 kt. Wind waves 3 ft. W swell 6 ft.
PZZ200 844 Am Pdt Sun Aug 20 2017
Synopsis for southern washington and northern oregon coast.. There will be little change in the marine weather through mid next week as high pressure persists over the ne pacific and a thermal trough remains across the southern oregon coast.

7 Day Forecast for Marine Location Near Bay City, OR
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location: 45.52, -123.92     debug


Area Discussion for - Portland, OR
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Fxus66 kpqr 201633
afdpqr
area forecast discussion
national weather service portland or
932 am pdt Sun aug 20 2017

Synopsis Onshore flow will produce varying degrees of morning
clouds, afternoon sunshine. With inland temperatures in the 70s and
80s for much of the next week. Monday and Tuesday will likely be the
warmest days. A weak storm system will bring significant cooling and
could bring a few light showers to the forecast area late Wednesday
and Thursday before temperatures warm back to above seasonal normals
levels next weekend.

Short term Today through Wednesday... Stratocumulus had trouble
forming this morning in southwest washington and northwest oregon as
the marine inversion has lowered a bit and because the air mass was
just not quite moist enough to develop the clouds despite the
continued onshore flow and the marine air mass across the area. The
only place that we can see any low clouds was along the south
washington coast. Higher clouds associated with a weak disturbance
moving through washington and southwest canada will move across our
forecast area today and early tonight but we should still see plenty
of sunshine through the thin high clouds. Temperatures today will be
near or just above seasonal normals, with 80 to 85 common inland from
vancouver southward.

Low clouds are solidifying off the coast this morning, largely due to
the passing weak upper disturbance, and these may increase a bit
along the coast today but will definitely push onto the south
washington and north oregon coasts tonight. The surface pressure
pattern suggests they will be less solid on the central coast around
newport. The low clouds will likely push inland along the columbia
river later tonight and early on Monday to kelso with some clouds
trying to reach the vancouver and portland areas. Believe the clouds
in the vancouver and portland area will mainly be scattered before
mostly clearing before the main part of the eclipse. Farther
southward in the willamette valley conditions will stay mostly clear
for the eclipse on Monday morning. Some smoke from fires in the
oregon cascades could drift west on Monday but this will be slow to
occur and probably not affect eclipse viewing.

Otherwise Monday afternoon will be sunny as the morning clouds clear
to a little ways off the coast under a building upper ridge. The air
mass will be warming, and coastal temps could reach the lower 70s in
areas, with upper 80s and lowers 90s common inland except mid 80s
near kelso.

The upper ridge starts to move off to the east Tuesday, but it is
still close enough for another warm day inland Tuesday with
temperatures in the mid 80s to around 90. We don't expect much in the
way of lower clouds inland on Tuesday, though the coast will see
increasing lower clouds that may persist or hug the coastline much of
the day.

Southwest flow aloft will be increasing Tuesday night and Wednesday
as the upper ridge continues moving eastward and the next system
approaches. This will mean persistent cloud cover at the coast,
perhaps even some spotty drizzle, and more morning low clouds inland
with resultant cooler temps. Temperatures inland will likely be close
to or a bit below seasonal normals Wednesday.

Some convection late Tuesday spreading north from a weak low over
california might clip the willamette pass area, but southwest flow
aloft will limit any coverage and how far north it can reach in our
cascades as it mainly spreads into central and eastern oregon. The
approach of the system Wednesday is making any chance of convection
in that area looking less likely as the southwest flow aloft and the
low level onshore flow increases. Tolleson

Long term No changes. Previous discussion follows...

Wednesday night through Sunday... Models are in good agreement a
shortwave trough will slide eastward across british columbia and
washington Wednesday night and Thursday. This should bring cooler
temperatures, increased cloud cover and a chance of light rain,
particularly along the coast and across the cascade foothills, but
even portions of the willamette valley could see some light rain.

Shortwave ridging should then build over the pacific northwest and
bring a return to more sunshine and above average temperatures
towards next weekend. Neuman

Aviation Vfr conditions coast and inland today. At 16z this
morning, there was a batch of stratus offshore from astoria cape
disappointment, but expect that to remain offshore today. Stratus
will move back into the north coast tonight after 04-06z with MVFR
and possibly ifr cigs.

Kpdx and approaches...VFR conditions today and tonight. Marine
stratus will push part way up the columbia river tonight to around
kls.

Marine A persistent weather pattern will result in little change
in the marine weather the next several days. High pressure holds over
the NE pacific while a thermal trough is along the south oregon
coast. This supports north winds across the south washington and
north oregon waters. The thermal trough strengthens each afternoon
such that the north winds will increase and become gusty each
afternoon. The winds south of cascade head will have frequent gusts
to around 25 kt which supports the current small craft advisory for
winds.

The seas will be locally generated from these winds and generally
remain 4 to 6 ft with periods at 9 to 10 seconds. The seas will be
choppier in the southern waters for the afternoons with dominant
periods possibly around 8 seconds. Tw bentley

Pqr watches warnings advisories
Or... None.

Wa... None.

Pz... Small craft advisory for winds until 11 pm pdt Monday for
coastal waters from cascade head or to florence or out 60
nm.

Small craft advisory for rough columbia river bar from 3 am to
7 am pdt Monday.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 2 mi52 min 49°F1020.4 hPa (-1.2)
46096 46 mi142 min NNW 9.7 G 9.7 53°F 55°F1022.2 hPa
ASTO3 - 9439040 - Astoria, OR 48 mi52 min WSW 11 G 13 65°F 70°F1020.6 hPa (-0.9)
46243 - Clatsop Spit, OR - 162 49 mi52 min 60°F4 ft

Wind History for Garibaldi, OR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Tillamook, Tillamook Airport, OR9 mi57 minNNW 710.00 miFair68°F51°F56%1021 hPa

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W17W3W5CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNW4NW3
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CalmNW8CalmCalmSW3NW7CalmCalmCalmSE3CalmCalmCalmCalmCalmW5W11W17
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W11W9W9S3CalmSE3CalmCalmCalmCalmSE4CalmCalmCalmCalmCalmNW4NW7N6W10
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Tide / Current Tables for Miami Cove, Tillamook Bay, Oregon
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Miami Cove
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Sun -- 05:02 AM PDT     Moonrise
Sun -- 06:22 AM PDT     Sunrise
Sun -- 06:43 AM PDT     -0.98 feet Low Tide
Sun -- 01:03 PM PDT     6.64 feet High Tide
Sun -- 06:39 PM PDT     1.83 feet Low Tide
Sun -- 07:44 PM PDT     Moonset
Sun -- 08:14 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
8.27.46420.3-0.8-0.9-0.21.33.24.96.26.66.35.342.821.92.645.77.2

Tide / Current Tables for Tillamook, Hoquarten Slough, Oregon
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Tillamook
Click for Map
Sun -- 12:15 AM PDT     7.31 feet High Tide
Sun -- 05:02 AM PDT     Moonrise
Sun -- 06:22 AM PDT     Sunrise
Sun -- 08:34 AM PDT     -0.59 feet Low Tide
Sun -- 01:42 PM PDT     5.92 feet High Tide
Sun -- 07:44 PM PDT     Moonset
Sun -- 08:13 PM PDT     Sunset
Sun -- 08:30 PM PDT     1.19 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
7.37.26.55.442.51.20.1-0.5-0.50.62.54.45.65.95.54.73.72.61.71.31.32.64.6

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of PacificNorthwest    EDIT
Geos

Wind Forecast for Portland, OR (16,3,4,5)
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Ground Weather Radar Station Portland, OR
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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.